Publikationer

Abstract: Bony fishes are among the best represented macrofossils from the earliest Eocene Fur Formation, northern Denmark. The most abundant fish of the formation has never been formally described, in spite of its abundance throughout the formation, and only referred to as an ‘argentinoid’. This work provides a taxonomic study of this argentinoid taxon, which is described herein as Surlykus longigracilis gen. et sp. nov. The caudal skeleton shows separated first preural and first ural centra, a unique condition within the Argentiniformes. In addition, it is characterised by having a large mouth and a single supramaxilla, which suggest that Surlykus gen. nov. occupies a basal position within the Argentiniformes, representing the sister-group to all the other lineages of this clade ([Argentinidae + Opisthoproctidae] + [Bathylagidae + Microstomatidae]), and, consequently, a stem-group Argentiniformes. Mass-mortality assemblages may indicate that Surlykus longigracilis gen. et sp. nov. formed large schools in the ancient North Sea Basin, where it probably represented the trophic nucleus of the fish communities.

Keywords: Argentiniformes, Surlykus longigracilis gen. et sp. nov, benchtop μXRF, Eocene, Ypresian, Fur Formation, Denmark.

Address: Ane Elise Schrøder [aneelises [at] snm [dot] ku [dot] dk], Natural History Museum of Denmark, Universitetsparken 15, DK-2100 Copenhagen Ø, Denmark; also Fossil and Moclay Museum, Museum Mors, Skarrehagevej 8, Nykøbing Mors, DK 7900, Denmark. https://orcid. org/0000-0001-9371-400X. Giorgio Carnevale [giorgio [dot] carnevale [at] unito [dot] it], Dipartimento di Scienze della Terra, Università degli Studi di Torino, Via Valperga Caluso 35, I-10125 Torino, Italy. http://orcid.org/0000-0002-3433-4127.

Abstract: This paper presents a new complete field mapping of glacial landscapes, landforms and sediments in the Faroe Islands, supplemented by observations from bathymetric maps of the Faroe Shelf. In addition, previous investigations of Quaternary and espe-cially the Weichselian glaciation of the archipelago are reviewed. New cosmogenic nuclide exposure ages indicate that the last extensive glaciation of the Faroe Islands occurred during the Late Weichselian, most likely during the Last Glacial Maximum (LGM; c. 26.5–19.0 cal. ka BP), although a Younger Dryas (c. 12.9–11.7 cal. ka BP) age cannot be entirely excluded. Geomorphological mapping provides a background for reconstructing the extent and type of the glaciation of the Faroe Islands. The reconstructed Weichselian glaciation appears to have had the character of an exten-sive valley glaciation, with several marine glacier termini. The present glaciation of southern Spitsbergen, Svalbard, represents a modern analogue of the reconstructed Weichselian glaciation in the Faroe Islands. The lack of raised coastal features in the Faroe Islands, also at protected sites, suggests that postglacial isostatic uplift was smaller than post-LGM eustatic sea level rise. Numerical glacier reconstructions carried out for different extents of the last extensive Faroese glaciation suggest that such limited postglacial isostatic crustal uplift requires that the Faroe Shelf was not extensively glaciated during the Late Weichselian, but it doubtless was so during at least one of the previous Quaternary glaciations.

Keywords: Glaciation, Faroe Islands, Weichselian, periglaciation, trimline, cosmo-genic isotope exposure dating, XRD analysis.

Address: Ole Humlum [ole [dot] humlum [at] gmail [dot] com], Department of Physical Geography, Institute of Geosciences, University of Oslo, Oslo, Norway. Hanne H. Cristiansen [HanneHvidtfeldt [dot] Christiansen [at] unis [dot] no], The University Centre on Svalbard (UNIS), Box 156, N-9170 Longyearbyen, Svalbard, Norway. Lis E. Mortensen [Lis [dot] Mortensen [at] jardfeingi [dot] fo], Jarð-feingi (Faroese Geological Survey), Jóannesar Paturssonargøta 32-34, FO-100 Tórshavn, Faroe Islands. Finlay M. Stuart [f [dot] stuart [at] suerc [dot] gla [dot] ac [dot] uk], Isotope Geosciences Unit, Scot-tish Universities Environmental Research Centre, East Kilbride G75 0QF, UK. John O. Stone [stone [at] ess [dot] washington [dot] edu], Cosmogenic Isotope Laboratory, Quaternary Research Center and Department of Earth and Space Sciences, University of Washington, USA.

Abstract: The upper Henson Gletscher Formation (Cambrian, Miaolingian Series, Wuliuan Stage) of southern Lauge Koch Land and Løndal, south-western Peary Land, North Greenland (Laurentia) yields diverse assemblages of phosphatised Small Shelly Fossils after treatment with weak acetic acid. The occurrence merits description as a fossil Lagerstätte on account of the exceptional preservation of soft parts in some specimens, although the phosphatisation itself is generally rather coarse. Bradoriid and phosphatocopid arthropods are common and display substantial variation in their preservational history. Some specimens retain traces of internal morphology, although details are generally obscured by indifferent preservation. Rare specimens extend the range of stem-group pentastomid arthropods back by more than 10 million years. A unique hatching larva demonstrates the same early developmental stage of a stem-group priapulan worm to that described in some present-day priapulans. The preservation of an in place operculum has demonstrated that the widespread, supposed mollusc Protowenella is actually an unusual, strongly coiled hyolith. Abundant coprolites and cololites provide additional evidence of early phosphatisation. In terms of morphology, Cambrocoryne lagenamorpha gen. et sp. nov. superficially resembles wiwaxiid and some annelid sclerites, thelodont scales and the foraminiferan Lagena, but its true identity is obscure.

Keywords: Lagerstätte, Henson Gletscher Formation, Cambrian, Miaolingian Series (Wuliuan Stage), North Greenland, Laurentia.

Address: John S. Peel [john [dot] peel [at] pal [dot] uu [dot] se], Department of Earth Sciences (Palaeobiology), Uppsala
University, Villavägen 16, SE-75236 Uppsala, Sweden.

Abstract: We retrieved a sediment core from Vasby Mose, a calcareous fen on eastern Sjælland, Denmark. The record spans the period from c. 14 700 to 6800 cal. years BP. During the Lateglacial, Vasby Mose was a lake where minerogenic sandy and clayey sediments accumulated. In the early Lateglacial, from c. 14 700 to 13 200 cal. years BP, a tundralike open, treeless vegetation with Betula nana and Dryas octopetala was found in the region. During the Younger Dryas, a rich flora of aquatic plants was found in the lake. In the Early to Mid-Holocene, Vasby Mose was a spring-fed calcareous fen, with deposition of peat and tufa. The flora included the sedges Carex rostrata and Carex paniculata, the aquatic plant Menyathes trifoliata, the calciphilous reed plant Cladium mariscus and the today nationally extinct bryophyte Meesia triquetra. The fauna included aquatic mollusc taxa such as Pisidium sp., Valvata spp. And Bithynia tentaculata and terrestrial or semi-terrestrial species such as Galba truncatula, Euconolus cf. alderi, Succinea/Oxyloma, Zonitoides nitidus and Vallonia pulchella. The Preboreal oscillation and other Early Holocene climate events are seen as short-lived, wet intervals.

Keywords: Lateglacial, Holocene, spring-fed fen, tufa, peat, gastropods, macrofossils, palaeoecology.

Address: Ole Bennike [obe [at] geus [dot] dk], and Bertel Nilsson [bn [at] geus [dot] dk], Geological Survey of Denmark and Greenland (GEUS), Øster Voldgade 10, DK-1350 Copenhagen K, Denmark.

Abstract: Tubes of a new serpulid species, Neovermilia gundstrupensis sp. nov., from the lower part of the Kerteminde Marl Formation (Selandian, middle Paleocene) of Gundstrup gravel pit, Fyn, Denmark, represent the first serpulids of this group from the Selandian of Denmark. Within the long-ranging genus Neovermilia (Oxfordian to Recent), the new finds extend the last recorded occurrence of an informal sub-group of closely related serpulids from the upper Danian to the lower Selandian. Neovermilia gundstrupensis is characterized by a tube increasing only slowly in diameter reaching up to approximately 5 mm and possessing small, often densely spaced annular striae occasionally merging into weakly but never strongly developed annular peristomes.
Almost all specimens found so far are attached to siliceous sponges of the genus Ventriculites. The tube morphology of the new species and the microstructure of the tube wall, as well as its palaeoecology are discussed.

Keywords: Polychaeta, tube worm, Neovermilia, microstructure.

Address: Tomáš Kočí [protula [at] seznam [dot] cz], Ivančická 581, Prague 9 – Letňany, 19900, Czechia and Palaeontological Department, Natural History Museum, National Museum, Cirkusová
1740 193 00 Praha 20 – Horní Počernice, Czechia. Jesper Milàn [jesperm [at] oesm [dot] dk], Geomuseum Faxe/Østsjællands Museum, Østervej 2, DK-4640 Faxe, Denmark. Manfred Jäger [langstein [dot] jaeger [at] web [dot] de], Lindenstrasse 53, 72348 Rosenfeld, Germany.